Now if this is a problem - how do I fix it? Can I just delete the logs and will it rebuild them from 0?

Unmount-wrapper sounds interesting. One of the other nagging problems I have is that I have a USB 1TB drive that I stored all my movies and CD's. The system finds it and then loses it and then refinds it. Seems like this happens several times a day. Could that be part of it?

Any help - even pointing me in how to search better is much appreciated.

I copied the logs to an external drive if I need to look at them. I read them and they are not really something I understand. Well - it does look like it is mad that I don't use this other external drive with movies on it anymore.

But I also moved a movie from the local drive and put it on the external drive and things seem to be working much smoother. I don't have quite 10gig but I am close.

The system manages all disks with a very intricate automounter. This mounts and unmounts volumes, and the unmount delay is very low, so you'll see cases where the disk is unmounted rapidly, particularly after UpdateMedia runs. This is normal, and was designed this way, so that different types of media could be easily hot swapped.